Tsuji H, Hirano N, Ohshima H, Ishihara H, Terahata N, Motoe T
Department of Orthopaedic Surgery, Toyama Medical and Pharmaceutical University, Japan.
Spine (Phila Pa 1976). 1993 Feb;18(2):204-10.
A morphologic comparison of the laminated structure of the anterior and posterior anulus fibrosus of lumbar intervertebral disc was made on 24 L3-4 and L4-5 discs obtained from 10 fetus, one child, and one young adult cadavers. Low power microscopic and polarized microscopic observations and measurements on the transverse sections were performed to assess 1) lamellar bundle arrangement, 2) number of distinct lamellar bundles, 3) percentage of incomplete lamellar bundles, and 4) fiber-interlacing angles. The number of lamellar bundles was greater in the anterior anulus than in the posterior anulus. A very complex structure was observed in the posterior middle anulus in all the specimens, with a high percentage of incomplete/discontinuous lamellar bundles and greater fiber-interlacing angles. Loose connection of the lamellar bundles of posterior outer anulus was observed in fetal discs. The annular strength was not measured in the present study, however, the risk of posterior disc rupture in the young may be influenced by an inherent structural variation with a weak posterior anulus fibrosus.
对取自10例胎儿、1例儿童和1例青年成人尸体的24个L3 - 4和L4 - 5椎间盘的腰椎间盘前后纤维环的分层结构进行了形态学比较。对横切面进行了低倍显微镜和偏光显微镜观察及测量，以评估：1）板层束排列；2）不同板层束的数量；3）不完全板层束的百分比；4）纤维交错角度。前纤维环中的板层束数量多于后纤维环。在所有标本的后中部纤维环中观察到非常复杂的结构，不完全/不连续板层束的百分比很高，纤维交错角度更大。在胎儿椎间盘中观察到后外侧纤维环的板层束连接松散。本研究未测量纤维环强度，然而，年轻人后椎间盘破裂的风险可能受后纤维环固有结构变异导致的薄弱影响。
